I am Akshey Gurnani from India. I am a Doctor. I like many things but reading articles is one of my best hobbies. Recently, I have known about new security systems like Tetra Radio. TETRA (Terrestrial Trunked Radio) is a standard for digital trunked mobile radio built up to meet the needs of traditional PMR (Professional Mobile Radio) user organizations like public safety, transportation, government, military facilities, PAMR commercial, and oil industry. In a simple world, TETRA Radio has a scalable architecture enabling economic network deployments from single-site limited area coverage to multiple site broad area state coverage.